Problem 2: Pin Number A pin number is a four-digit number whose digits sum is a

Question

Problem 2: Pin Number

A pin number is a four-digit number whose digits sum is a multiple of 10. A one check digit is usually added to the right of a three-digit number to form the four-digit pin number. For example, for the three digits number 572 we add the digit 6 to the right to form the pin number 5726 whose digits sum 5+7+2+6 is 20 which is a multiple of 10.

Write a program that prompts the user to enter a three digits number then form and print the four-digit pin number.

Note:- (Using C++)

Explanation / Answer

#include <iostream>

using namespace std;

int main() {

                int OriPin,NewPin,num,sum=0;

                cout<<" Please enter 3 digit pin number : ";

                cin>>OriPin;

                num = OriPin;

    while (num != 0)

    {

        sum = sum + num % 10;

        num = num / 10;

    }

    if (sum%10 == 0)

    {

        //If Original pin is divisible by 0

        NewPin = OriPin*10;

    }

    else

    {

        //First multiply original number by 10 and then add (10-(sum of orginal number digits %10))

        NewPin = OriPin*10 +(10-(sum%10));

    }

    cout << " Entered pin is "<< OriPin << " New Pin is " << NewPin;

                return 0;

}

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